Suction box cover



2 SHEETS- SHEET 1 J. P. vAN RYzlN suc'sIoN Box COVER Nov. 18, 1952 Filed oct. s, 1949 INVENTOR JOSEPH P. VAN Rvzm ATToR .|lll4ll Illlll 0 O G C@ NOV. 18, 1952 J, P, VAN RYZlN 2,618,206

SUCTION BOX COVER 2 sx-xEETs-SHEET' 2 Filed Oct. 3, 1949 INVENTOR AJOSEPH P VAN RYZIN ATTOR EYS Patented Nov. 18, .1952

' SUCTION BOX COVER fApplication October.' 3, 1949, Serial No. 119,370

.l-SLLClaims. .1.1 This'i-invention =appertains Ltesi-lotion boxesA for Four'drinier and'likepaper-sheet drying machines var`1d-more'1oarticularly-fto a, Inovelfcover for -such suction-boxes.

One of the-'primarylobjects of v'theinve'ntion -istocprovdeiaasuction box-coverlbuilt yup in a novel mannen from* like verticalblocks --to form slots-#in the zcover--which#extend transversely -of the wire Afor felt,'-as lfthe fr ease may -be,- and the interiitting'- andeengagementi yof lthese-.elemen'ts tofform -thedesired.- cover.

aA-'suction-box-covereonstructedin-f'accordance Lwithftlfiis invention has-the=advantages'-of solving yraw"material-problems by utili-zing small Lnarrow blocks =o like construction-I' inlieu ofdplanks vto provide- -large rectangular Mopenngs l orf slots f. to eliminate eloggingfandf to increase the open-area .of E--the-boxx=to f provide greaterV drainv` varea-i and hence reduce the suction or va'cuuminthebox lengthlforA width bythe i mere"1 additionlfof :more blOeksfand cross members V"Likewise, l the -fcon- :expand inl the i direction' "of fthe'- vsides oil-the xbox.

-LA-'fur-ther :important :object of kkthe invention `is :tlfiepro-vision'u of vnovel-"means for-arrangingfthe supporting `cross membersl` relative -to the cover, lwhereby ithel jointsI of the vertical blocks' willlnot bein'f r-line w-ith the rtravel of the wire,'-=so'tl1at Wear -ffonl-fsaid wire A will be '#reducedfv to aeminimum.

Ay ifurther-"importantlobjectofv=the 'invention is the fprovision' ofmeans -.whereby-f each block lis 'of like, --identical construction, and= whereby; each block can beindividuallyremoved and replaced, whereby to materially increase-the-lifef-ofthe coverA andyredu'ce 4tlie'-cost in the dressing of covers incident .to wear thereon.

A further object ofmy invention is to provide alibuilt upvfcover forvsuctionlboxes which vwill be durable and ecient in usa-one fthat-vvill be simple and/reasy'tomanufacture'and fone which can be, .placed upon the market at a reasonable costi'andv lower the cost per'tonofpaper.

'TWith'these and other objectsjn Viewthelin- -vention consists in' 'the novel .construction`,. .arrangementand'formation of parts as will Vbehereinafter more specifically described and claimed, and illustrated in the accompanying drawings, in which drawings,

Figure 1 is a, topl plan View of a suction box equippedL-withl the'novelcover; parts/ef theL View being shown broken-awayandinfse'ctiontoiillustratelstruotural: detail.

/l-Figure f 2 is ---a longitudinal, a sectional view through the; boxfand cover takenv on ytheline22-242 of--iligure blocking in the-'djrectionrofthe arrows.

- -l-igure 3 isa transverse sec'tionalvevvmaken'Y on theinfie-*3 3l of Figure l`,' looking -in 'thef direction "of l'the arrows.

-fFigure' 5 is anf endfelevationalf view -o`r" .onesof `Jche vertiealiblocks.

Figure 6 isatopplanf-viewof oneofthe blocks.

JFigure -7 is a ibottomf- 'planlviewl off'oneL-'offlthe blocks.

lFigure 8 isA altop plani -viewof-one of'thef-cross members.

Figure `9v is a fragmentary;rsideelevationalview of one of? thecross members.

Referring .t0 the. drawings in-'idetailf-wherein Vsimilar reference characters designate v"corresponding parts-throughoutftheseveral vewsithe letter' B generally indicates" -a *suctionIbox-an vC the novel vcoverA therefor. Thef-boXeBis ofesubstantially the usual character einployed-'in'-Foludlrinier `machines and will -not` :bef described" in minute=- detaill-butit is to ibe `notedftl1atthes'ame includes' spaced, Yparallel side lWalls AI 0'A andconnecting end #walls l I. i '1?l1e-''s`ideJ walls 10i have atta'ehed '-ther'eto longitudinally extending nrails -IZrwhich=project-abovethe upperf-surface-ofthe side and-end-Walls l ari-'d1 lof the-box. :AsY illustratedy'therails i2 are 'secured toroutwardlyfeextending portions I 3 formed' oni orl carriedrby the sidewalls 10 0f thetbox.

*The novel 'cover includesa main v'Central section "Hl which extends .thefull widthi of' the'Eourdrin'er ,wire andthe'rconstru'otion of this .section `ldfforins 4vione offthesalient "features ofthein-i Ventron. 'The Fourdrinier wire movesacrosslthe top surface of section I-fLin the.,direction'fthe arrows' shown' .in"lig11rd.1. o'fthe' drawing.

Thersectionl 4 includes. afplurality. ofspaced, parallel1cross;members If. .-The.cross..zmemhers '.I maybeshape'd .to'lt ltheffastenings provided bythefmanufacturerss.ofgsuction boxes.

' Attention isidireictedtthe fact ,that the-:cross memhersl extond..diagonally..aerosse hee-box or at an. acute -angle to the transverseeaxiseof the.' box. and. cover. The;.mpositewsidesrofl-the cross' members Al5, arer providedfatspaced points with vertically extending dovetailed grooves Il. The cross members are preferably formed from wood with a grain, but it is to be understood vfor the passage of water. the meeting edges of the blocks are in diagonal that the same can be made from metal plastic or any rigid material or combination of materials.

The cross members I carry and detachably support a, series of novelly formed vertical blocks I8. The blocks are all of identical construction and each includes a narrow body. The ends of the body adjacent to the lower ends are cut away to provide stop shoulder.` I9. The ends of the blocksrare beveled as at 2B, and hence these ends are at an acute angle relative to the transverse axis of the blocks and at the rsame angle as the cross members. The opposite side faces of the blocks adjacent to their lower ends are provided with V-shaped grooves 2| and the grooves 2l in combination with the angles and faces of the blocks form tenons for sliding in the dovetailed grooves I1. f

In assembling the main section I4, the rails can be spaced to provide the desired openings of various dimensions and the vertical blocks are slid into the grooves vwith their edges in intimate contact asis clearly shown in Figure 1. In effect, the blocks form longitudinally extending rows or rails arranged in spaced relation and the spaces define longitudinally extending drain slots 22 It is to be noted that lines'anddo not extend directly transversely of the cover hence the joints are at an angle .to the warp or chute of the Fourdrinier wire and this reduces wear on the wire. The blocks are preferably formed from wood with the grain running vertically thereof and hence any expansion in the .blocks will take place longitudinally and side .pressure on the walls' of the box is eliminated. Obviously, by using the small, narrow blocks, select timber can be utilized and the need of long and wide planks is eliminated. I-Iowever, the vertical blocks can be made from metal, plastic, or any rigid material or combination of materials. e The slots give the advantage of large drainage area, kwhichr decreases the amount of suction necessary for draining the water from the sheet and wire.n Hence the `wire is not pulled with undue force against the cover and wear thereon is materially reduced. V- j Obviously, the cover can be made of any desired width, say with two rows of blocks to form one slotvor a multiplicity of rows of blocks (see Figpres 1 and 3) to form a plurality of slots. Likewise, the cover can be made in any length by merely addingemore cross members and blocks. l Itis proposed to finish off the ends of the cover by providing end sections 23. These end sections 23 can include pieces 24 and 25 vhaving drain openings 26 therein and the ends of these boards or pieces are beveled to slidably fit in the suction box fastenings provided by the suction box manufacturere. The end sections can also include finishing, non-perforated pieces 21 and the ends thereof are beveled to slidably fit in the suction box fastenings."

" From the foregoing description, it can be seen that the cover has numerous advantages over the ordinary type of suction box covers and particularstress is laid on the fact that there are no joints in the built up cover which are parallel with the warp or chute of the Fourdrinier wire. Because I employ narrow end wood blocks to form the slots and because IA can increase the open area, I can provide greater lubrication thereby reducing friction ,between the wire and the cover. In other words, the narrow wood blocks I use in my construction are much easier lubricated than the large wood and plastic areas employed in other types of covers. Due to the locking connection of the blocks with the cross members an exceptionally rugged and durable construction is had. The construction is such that the cover maintains its original strength until the blocks are worn down to the cross members l5. Y

Changes in details may be made without departing from the spirit or the scope of this invention, but what I claim as new is:

1. A suction box cover for Fourdrinier and like machines comprising a series of spaced transverse cross members, said cross members having their side faces provided with spaced vertical grooves, and a plurality of like thin upstanding blocks having their lower ends reduced in length ydeiining end stop shoulders, said lower ends be;

ing received in opposed grooves in adjacent cross members with the shoulders resting on the upper faces of said cross members, said blocks having their end edges above the shoulders in intimate contact and said blocks being independently and freely removable from the grooves.

2. A suction box cover for Fourdrinier and like machines comprising a series of spaced parallel transverse cross members, said cross members all extending diagonally relative to the warp of the Fourdrinier wire, the side faces of said cross members being provided with dovetailed vertical grooves, and a plurality of thin upstanding blocks having their lower ends reduced in lengthdening stop shoulders, said reduced portion of the blocks having their ends fitted in opposed grooves of adjacent cross members with the shoulders resting on the upper faces of the cross members, the ends of said blocks above the shoulders being in intimate contact, and said joints at the meetingV ends of theblocks being in diagonal lines relative to the warp of the Fourdrinier wire, said blocksbeing independently and freely removable Vfrom the grooves. j A3. In a suction box for Fourdrinier and like machines having side walls and rails carried by the upper end of said side walls, the inner faces of said rails being beveled, a cover for said box comprising a main central section including a plurality of spaced parallel transverse cross membersv having their ends beveled and received in the beveled facesrof the rails and having their sidefaces provided with spaced.Y vertical grooves, a plurality of upstanding blocks arranged in longitudinal spaced rows and having their lower ends reduced in length defining end stop shoulders, said lower ends being received in opposed grooves in adjacent c ross members, and end sections including perforated boards engaging theopposite ends of the rows Aof blocks fitted in the beveled faces of the rails. i 1 Y,

JOSEPH P. VAN RYZIN.

REFERENCESV CITED l The following references are of record in the le of this patent:

UNiTED STATES PATENTS '2,408,176 Proulx Sept; 24, 1946 

